4.5 - GREEN MACHINE
™
- North America - Installation, Operation, Maintenance, & Troubleshooting Manual
Chapter 9: Replacement Procedures
Page 190
Leak Test Procedure, continued…
9.11.3
Leak Test Procedure
1.
Install the Leak Test Fixture in the empty 1” pipe tee on the
GREEN MACHINE.
See Figures 9-39, 9-40, and 9-41.
2. The Leak Check is conducted with 1.0-PSI nitrogen.
3. Make sure the isolation valve on the Leak Test Fixture is fully closed.
4. Make sure the Leak Test Fixture pressure regulator is fully closed.
5. Make sure the nitrogen regulator is set to 2.0-PSI outlet pressure.
6. Slowly open the isolation valve on the Leak Test Fixture to provide pressure to the
regulator.
7. Slowly open the Leak Test Fixture pressure regulator until the pressure gauge reads 1.0-
PSI.
CAUTION: PRESSURIZING THE GREEN MACHINE OVER A MAXIMUM OF 2.0 PSI MAY
CAUSE DAMAGE TO THE GREEN MACHINE O-RINGS AND/OR PUMP SEALS, WHICH WILL
VOID ALL WARRANTIES OF THE GREEN MACHINE.
8. At the GREEN MACHINE Controller, press the F1 button to start the Leak Test, which will
disable the Vacuum Pump and open all of the control valves.
See Figure 9-38
.
•
The Leak Test will continue until one of the following conditions is met:
•
The F4 button is pushed -OR-
•
The GREEN MACHINE Controller internal timer times out at 30
minutes.
9.
With the GREEN MACHINE pressurized at 1.0-PSI nitrogen, spray a soapy solution on
each fitting to check for bubbles:
•
If bubbles do not appear, the connection is tight.
•
If bubbles do appear, tighten the leaking fitting 1/8” turn (maximum) and
re-check for leaks.
•
If the fitting cannot be tightened so that the connection is leak free,
replace the 45° flare tube assembly that is leaking with a new tube
assembly.
10.
Continue this process until all the internal tube fittings have been checked and found
leak free.
11.
If additional time is needed to conduct the Leak Test, push the F1 button again to
re-start the 30-minute timer.
